COMPARISON OF PAIN FREQUENCY IN PATIENTS UNDERGOING ELECTIVE SPINE SURGERY: VALSALVA MANEUVER VS. CONTROL GROUP DURING SPINAL ANESTHESIA. Journal of Population Therapeutics and Clinical Pharmacology, [S. l.], v. 31, n. 5, p. 524–528, 2024. DOI: 10.53555/jptcp.v31i5.6188. Disponível em: https://jptcp.com/index.php/jptcp/article/view/6188. Acesso em: 28 sep. 2024.